/* * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org * * This software is provided 'as-is', without any express or implied * warranty. In no event will the authors be held liable for any damages * arising from the use of this software. * Permission is granted to anyone to use this software for any purpose, * including commercial applications, and to alter it and redistribute it * freely, subject to the following restrictions: * 1. The origin of this software must not be misrepresented; you must not * claim that you wrote the original software. If you use this software * in a product, an acknowledgment in the product documentation would be * appreciated but is not required. * 2. Altered source versions must be plainly marked as such, and must not be * misrepresented as being the original software. * 3. This notice may not be removed or altered from any source distribution. */ #include <Box2D/Dynamics/b2WorldCallbacks.h> #include <Box2D/Dynamics/b2Fixture.h> // Return true if contact calculations should be performed between these two shapes. // If you implement your own collision filter you may want to build from this implementation. bool b2ContactFilter::ShouldCollide(b2Fixture* fixtureA, b2Fixture* fixtureB) { const b2Filter& filterA = fixtureA->GetFilterData(); const b2Filter& filterB = fixtureB->GetFilterData(); if (filterA.groupIndex == filterB.groupIndex && filterA.groupIndex != 0) { return filterA.groupIndex > 0; } bool collide = (filterA.maskBits & filterB.categoryBits) != 0 && (filterA.categoryBits & filterB.maskBits) != 0; return collide; }